Wrapping machine



oct. z5', 1921. 1,646,491

C. SANDBERG WRAPPING MACHINE:

iled Jamas'. 1925 sheets-sheet;

[51V TOR.

v: f @JW SMQ?,

o 2 1 o Oct 5 927 o. sANDBl-:RG

WRAPPING' MACHINE 4 Sheets-Sheet 2 /N VEN TOR.

1 646 491 Oct. 25 1927. o. SANDBERG y v WRAPPING MACHINE fm Filed Jan. 23. 1925 4 Sheets-Sheet 3 @d/ml l Oct, p

O. SANDBERG WRAPPING MACHINE Filed Jan. 2s. 1925 TTOH/VEYS Patented-Oct. 2.5, 1927.

UNITED STATES PATENT OFFICE.

OSCAR SAN DBERG, OF BATTLE CREEK, MICHIGAN, ASSIGNOR TO JOHNSONv AUTO- MATIC SEALEB C0., LTD., F BATTLE CREEK, MICHIGAN, A PARTNERSHIP ASSOCIA- TION; LIMITED.

WRAPPING MACHINE.

appiicationmed January 2a, 192s. Asei-iai 110.614,448.

The present invention is an improvement ment with the rear under flap of the wrapper 55 in wrapping machines for cartons and the and hold them depressed preferably below like, particularly of the flat type used for the level of the table or support. packing bacon. These cartons have hereto- The invention will be better understood fore been wrapped by'hand as they preby reference to the accompanying drawings,

sented a very difficult problem in automatic illustrating one expression ofthe inventive 60 Wrapping, in view of the fact that the ldea, and whereinheight of the package .was only a Small Fig. 1 is an end elevation, the infeed belt fraction of either of its other two dimenfor the cartons being shown on the right and 1o sions, the paper-feed mechanism on the left;

To successfully and automatically wrap Fig. 2 is a. perspective view showing the 65 and seal such a package, it is necessarythat manner in which the various parts `are the folders shall operate on the projecting driven; ends of the Wrapperand that the flaps be Fig. 3 is a perspective showing the ele-- folded about the ends of the package. In vator for raising the cartons from the inview of the limitations of space on the ends feed belt, vthe cam for the same, and the 70 of these cartons, the problem of automaticam for operating the rear bottom fiap cally, continuously and quickly wrapping folder; n such cartons at a speed of fifty or more per Fig. 4 is a perspective view showin the aominute has presented great difficulty. latch for holding depressed the yie ding The, problem has, however, been solved pivoted lingers that engage the wrapper on 75 by means of a folder that, inA its preferred the front and under faces of the carton; embodiment, first operates to fold the front Fig. 5 is a detail showing the manner in end flap and thereafter fold the 'rear end Whlch the lingers engage the front under flap, the top and. bottom flaps being folded flap 0f the wrapper; 4 a

. by stationary folders. In this embodiment, Flg. 6 is a perspective view illustrating 80 after the front end flap is folded, a spacer the movable end flap folder about to make automatically opei'ates to hold the upper and the front end flap; lower end flaps in position, in order that the Fig. 7 is a similar View showing the front projecting ends of the wrapper shall be end ap completed and the spacing element properly presented to the folder for the holding the upper and lower end flaps 85. making of the rear end Hap. This front spaced apart with the movable flap foldel.` and rear end flap folder is preferably a about to make the rear end iap; unitary structure mounted on a vertical axis Fig. 8 is a perspective view showing a that is operated by a suitable cam to effect Wrapper with the front and rear end flaps first the folding of the front end flap and completed and the stationary folder about 90 thereafter the folding of the rear end flap. to make the bottom end flap;

Afurther feature of the invention isthe Fig. 9 is a perspective view showing the provision of a latching device for holding stationary top and bottom end flap folders;

in a lowered position, as the carton is moved Fig. 10 is a view showing the bottom end forward from the elevator, the yielding iap completed and the wrapper in position 95 pivoted fingers that engage the front face to have-tlie top end iap formed; v of the carton at the time the rearv face is Fig. 11 is av perspective view showing one engaged by the follower on the continuous form of carton aswr'apped on the machine;

conveyor. Heretofore these fingers have Fig. 12 isa perspective'view of mechabeen free to press against the wrapperl onv nism for applying a strip of'adhesive to 100, l the under side ofthe carton, and it has been the wrapper; and" found, particularly with the type of carton Fig. 13 is a corresponding elevation pait' under consideration, that they acted as a. ly in section.

5ov drag on, and tended to displace, the under Referring to the drawings whereinlike rear flap. Accordingly, automatic latching reference numerals indicate like parts, 15 105 means have been provided that engage said indicates the -usual infeed belt on whichthe fingers after they have acted on the front cartons are manually or automatically deunder Hap and are about to pass into engageposited and by which they are introduced a bevel gear 22 that meshes with a bevell gear 23 on shaft 24. This shaft 24 carries a. pulley 25 around which passes a drive belt 26 which also passes around a pulley 27 on the shaft of the armature of the motor 28.

A belt tightener 29 may be provided if desired.

lWhen the carton has reached the desired position on the belt 15 to be raise-d into engagement with the followers on the wrapping conveyor, it is spaced immediately over the elevator 30 (Fig. 3). This elevator is preferably constituted by a pair of U-shaped members 31 and 32 connected by horizontal portions 33 and 34 and so arranged that when the elevator is raised the portions 33 and 34 vwill pass upwardly on either side of the infeed belt 1 5 and will raise the carton from, the belt and in position to he removed from thev elevator by a follower on the wrapn ping conveyor. As lbest shown in Figs. 2

" and 3, this elevator is operated from a shaft 35 which carries a cam 36 that operates through cam strap 37, lever 38 pivoted at 39 and link 40 to raise and lower said elevator. The shaft 35 is provided with a sprocket wheel 4l about w 42 which also passes around a sprocket wheel 43 carried by a shaft 44. This shaft 44 is driven from shaft 24 by a sprocket chain 45 engaging a. sprocket wheel v46 on shaft 44 and a sprocket 47 on shaft 24.

The carton is raised by the elevator into engagement with the under surface of a wrapper which is moved into-position over thecarton in any suitable manner as by a pair of belts 48 and' 49 passing around puleys on a shaft 50. The sheets are supported on these belts and the upper surfacev of the sheets may be engaged by suitable tens-ion rollers 51 (Fig. 1). The

aper -is fed from the roll 52 carried in rackets 53. the web passing around roller 54 through rollers 55 and 56 and between the roller 57 and the knife 58 which severs the web into wrappers of proper size. If desired, the feed belts 48 and 49 may be driven only when a sheet is being moved into position above the carton on the elevator, and

'. if this is desired the said belts may be Adriven from `shaft 50 which carries a sprocket wheel 59 around which passes a sprocket chain 60 and `which also passes around a sprocket wheel 61 on shaft 62that carries pulleys 63 and`64 around which thel belts 48 and 49 also pass, Sprocket wheel 65 is provided to position the chain 60, and

'.helt trghteners 66 and 67 may be utilized if desire As the carton is forced upwardly agamst ich passes a sprocket chain the wrapper, the upper face of the-wrapper is engaged by lingers 68 and 69 on shaft 70 and 71 and 72 on shaft 73. Shaft 70 has associated therewith a coiled spring 74 to hold its fingers yieldingly in en agement with the wrapper on the carton, an shaft 73 has a similar spring 75 for the same purpose. As the carton is forced upwardly against the wrapper, these yielding lingers will pass from engagement with the top of the wrapper down into engagement with the front and rear ends of the same. At this time the rear under flap holder 76 operates to fold the rear under flap of the wrapper. This folder is operated from cam 77 on shaft -35 through a lever 78 pivoted at 79, and

link 8,0, arm 81 on vertical shaft 82, arm 83 on said shaft, and link 84, one end of which is connected toarm 83 andtheother end to the shank 85 of the folder 76. This folder 76 ls provided 'with a pair of slots 86 and 87 that, as the folder moves forwardly to perform its function, pass around the enlargments of the pivoted Yfingers 71 and 72 and also around the U-shaped members 31 and 32 of the elevator.

After the rear under llap has been folded, the carton is engaged ,by one of a plurality of-followers 88 carried on the wrapping conlveyor 89. This conveyor preferably passes aroundja sprocket wheel 90 on shaft 91 and a sprocket wheel 92 on shaft 93. The shaft 93 carries a gear 94 that meshes with a pinion 95 on shaft 96, and this latter shaft is driven from a shaft 97 through a sproket wheels on said shafts. Shaft 97 is driven from shaft 44 through sprocket chain 99. As the carton is moved forwardly under the influence of the follower 88, the front under flap 100 (see Fig. 5) is folded over the rear under flap 101. The moving carton has forced the lingers 68, 69 upwardly, then forwardly in an anti-clockwise'direction as the carton is progressed in a horizontal direction and, as this movement of the carton continues, these lingers engage the front under flap 100 of the wrapper. This engagement of the lingers with the flap 100 is desirable as it smooths the wrapper and Wraps it closely about the carton, but it has been experienced that, when these fingers pass out of engagement with the front under flap 100 and into engagement with the rear under flap 101, they tend to pull this latter flap out of place. Means have accordingly been provided to permit these fingers to act ony -chain 98 passing around suitable sprocket forward into engagement with the finger 104 just before the pivoted members 68 and 69 are about to pass outrof engagement with the front under flap 100. When it is moved -to so engage the finger 104, it operates to 112 of which is connected to one end of a link 113,'tlie other end of which link is connected to the latching-member 102.

The carton with the front and rear under ila-ps folded is now progressed by the fol` lower 88 into' position for the folding of the fro'nt and rear end flaps.. As .here shown,

the front and rear end flaps on one end of the carton are folded by a single folded member 114 pivoted on a verticall shaft 115 that carries a pinion 116 meshing with a gear 117 carried on shaft 118. The shaft 118 has keyed thereto a collar 119 from which projects an arm 120 to which is connected one end of a link 121,- the other end of which is connected to the upper end of a lever 122 pivoted at 123 and operated bya cam 124 mounted onv shaft 44. The folder 114 first operates (see Fig. 6) to makethe front end flap fold, and thereafter, under the -influence of said cam 124, the said folder operates in a vcounter-clockwise direction to effect the rear end flap fold. In order that the wrapper may. befproperly held for the making of the rear end fold, a spacer member 125 'is preferably mounted on the folder 114 and passes between the upper end flap 126 and the lower end flap 127 immediately after the front end fold has been made. This spacer 125 is twisted in Atwo planes so that the point 128 thereof will engage the under flap 127 at the same time that the vbend 129 is en aging the top flap 126.` As shown in Fig. 7, the folder 114 has made the front end fold and the spacer is in position between the upper and lower vila s tohold the wrapper 1n position, and the older 114 is about to move in a counterclockwise direction under the influence of cam 124 to make the rear end fold. As shown in Fig. 8, the front and rear end folds have been made and the upperlla 126 and 127 are now ready to be folde In order that like movements may be imparted to an identical mechanism on the other side of the machine to fold the other end flaps, one end of a link 130 is connected to a pin 131 carried by gear 117, and the other end of said link 130l is'connected to a pin 132 carried by a gear 133 identical in all respecte 114l identical to folder 114..

' to employ to gear 117,

pinion '134, identical mounted on a shaftthat carries said gear 133 meshing with a to pinion 116, and the folder It will of course be understood that, through the connections described, when the folder 114 is moving in a clockwise direction, the folder 114 will be moving in a counterclockwise direction and vice versa.

^ After these front and rear end flaps have been folded and the wrapper is in the position illustrated in Fig. 8, the end flaps 126 and 127 pass into engagement with stationarymeans for effecting their folding.v As shown particularly in Figs. 8 and 9, the lateral margins of the carton ass under plates 135 and 136. frame of the machine in any suitable manner as by the top of the carton. The stationary folder for the under end flap is in the form of a twistedJoar 139 secured at 140 to the frame of the machine, and this bar acts in the well known manner to-fold the under rear ila as shown in Fig. 10. At this time the a hesive may be applied to the under face of `the flap 126 if desired. It is sometimes de- The former is secured to the a bracket 137,'and a spring tongue 138 is formed therefrom and presses upon shaft 142 and receiving glue from a receptacle 143 carried by the frame of the machine. The shaft`142 is driven from shaft 107 by a sprocket chain 143." An identicalglue-applying construction is provided' for the'other upper end flap.

After the glue j has been so applied, the upper end flap 126 is'folded bythe construction shown in Fig. '9. As there. illustrated, the plate 136 .is provided with a curved portion 144 that j initiates the fold, the fiaplbeing gradually turned' sharply down over t e end of the carton by the part 145 and finally completely turned under the bottom of the cartony by the part 146. rlhis operation effects a wrapping and sealing as indicated in Fig.. 11, in` which the lines of glue 147 and 148 are shown on the bottom be effected on the ends of the 4cartons and that the flaps need not be so long asvto e'ect the sealing v f,

ilo

on the bottom of the carton'. lf it were deto seal theflaps on the ends ofthe it would no t be necessary or desirable the part 146 of the upper end Hap signed carton,

folder.

It is desirable that the paper-feed shall be controlled by the cartons on the infeed belt so that, if no carton is present in position on the infeed belt 15, no Wrapper will be'fed in position. As showna detector 149 is carried by. an arm- 150 pivoted at 151.

. When, a carton lengages the detector 149, a

lug 152 on the arm 150 is moved behind a lug 153 yon slide v154 whichl is reciprocated .transversel of the infeed belt through an arm155,s aft 156, arm' 157, link 158 and cam '159 on Ashaft 107. This operates to shown in Johnson Patent No. 1,270.416, no

withdraw the detector from the path of the cartons and operates throiwh link 160, arm 161 on shaft 162 andvsuitable members 163 and 164 to; operate the'clutch mechanism 165 on shaft44hto effect the feed of paper from the roll 52, 'and also-to eifectthe operation of the cutting mechanism.A As this clutch mechanism is preferably the ,same as that further description ofthe saine is'necessary.

VThe operation of the machine is preferably controlled manually by the usual lever 166 lpivoted at 167 that operates through links 'e 168, bell-crank 169, link 170 and fork 171 to open and close thel clutchon shaft 24.

.It is sometimes desirable toput a. strip of glue on the Wrapper as it is being 1fed into the machine so that when the package isl first banded by the wrapper, the oscillating edges of the wrapper will adhere.y Preferably, the.

strip of glue is vput on the Wrapper nearits `rear edge (as seen in Fig. 12), this part of the wrapper constituting the rear -bot-tom fold. As shown in Figs. 12 and 13, 172 is the adhesive container in which rotates a roller 173 mounted. on a shaft 174. This v shaft carries a ratchet 175 that is intermittentlyrotated through the agency of a pawl 176 carried by an arm177. This arm is vinoved from shaft 82 through the medium of an arm 178 'and a link 179. The sheet of paper 180, as'seen in Fig. 12, is inl position to have a strip of glue applied to the top of the same nearthe rear edge thereof by means of a glue-applying member 181. At this ytime the sheet is'supported near its rear edge by a stri-p 182 (see Fig. 13). The glue-applying member'181 is carried by a pair of arms 183, 184 mounted on a shaft 185. IThis shaftcarries an arm 186 .to the free end of which is connected one end of a link 187.

The -other end of said link is connected to kone arm 188 of'a bellcrank lever pivoted at 189, the other arm 190 of which bell-crank lever carries a roller 191 and is engaged by a cam 192 keyedto the shaft 107. This cam operates to move the glue-applying member 181 into contact With the Wrapper 180 and also, to move the glue-applying member 181 a further distance to engage it with the roller 173. In order to perform thesefunctions,

said cam 192 is provided with two rises 192 and 192". When the .rise 192*1 engages `the bell-crank lever, the glue-applying member l181 is moved into engagement with the wrapper, and when rise 192b engages the bellcrank lever, the glue-applying member 181 While for the purposes of illustration, the invention has been described-and shown in considerable detail, it is-to be understood that the .invention is'not limited to the particular mechanical embodiments herein set forth but 'that the inventive idea is susceptible of various mechanical expressions within the limits of the appended claims.

What is claimed is 1. In a device of the character described, the combination of an endless conveyor for cartons, means for feeding Wrappers to the cartons above the latter, means for applying a strip of glue to the wrapper at the rear thereof, and means for folding a wrapper about each carton, said meansincluding a member for turning the rear portion of the wrapper up against the bottom of the cartonwith the glue strip disposed outwardly.

2. In a device of the character described, the combination of an infeed beltfor'carltons to be wrapped, a wrapping conveyor provided with followers, and a .vertically reciprocating elevator engaging each carton on each slde'offsaid belt'and raising thesame into the path of said followers.

3. In a device of the lcharacter described,

the combination of an infeed belt for carton-s to be wrapped, a wrapping conveyor provided with followers, and a vertically reciprocating elevator provided with U- shaped members engaging each carton on each side of said belt and raising the 'same into the path of movement of said followers.

4. In a device of the character described,

an endless carton conveyor provided with followers, means for engaging a carton With a wrapper and moving the same into the ypath of one of saidffollowers, a yielding member in the line of conveyor travel for engaging the front .bottom flaps of the wrapper to hold it Aclosely against the bottom of the carton, and means automatically moving said yielding member away from the carton before it can engage the rear bottom flap of the wrapper.

5. In a device of the character described, a continuously movable endless carton conlveyor provided with followers,-

means for enga 'ng a carton with a wrapper and mov-v ing t e same into the path of one of said followers, a yielding member in the line of conve or travel for engaging the front botf tom ap of the wrappergto hold it closely againstthe bottom of the carton and cam operated means moving said yielding member away from the carton before it can engage the rear under flap of the wrapper.. 6.4 In a device of the character described, folding devices, a Wrapping` conveyor for j progressing wrapped cartons past said devices, a pair ofyielding members engaging the front under flap of 4the wrapper, and` L means for moving said members away from they. engage the rear the wrapper o before 7. In a device of the character described, folding devices, a wrapping conveyor4 for progressing wrapped cartons past said de'- vices, a pair of yielding members engaging the front under Hap of the-wrapper, and a E'voted latch operated to move said mein! rs away from the Wrappers before they engage the rear under iap.

8. In a device of the character described, the combination of a continuously' moving f carton-feeding and .wrapper-folding mechai the other folds.

'nism,y the 'latter including an element movable toward 'and away from the path of travel of the cartons and operating to form the front and rear end folds on one end of the carton, and other means for forming the other folds. i l

9. In a device of the character described, the combination 4of a continuously movable carton-'feeding and 'wrapper-foldin mechanism, lthe latter including a pivote element movable to form first the frontend fold and then the rear end fold. on one end vof the carton, and other' meansffor forming the other folds;v

10. Ina device of the character described,

thefcombination of an endless carton-feeding conveyor and a -wrapper-folding mechanism, the latter including an oscillating element vmovable toward and away from thel line of conveyor travel to first form lthe front end fold and then to form the rear end fold on one end of the carton, and other means for forming the lother folds.

11. In a device of the character'describe'd, the combination of an endless carton-feeding conveyor and a wrapper-folding mechanism, the latter including a pivoted element movable first in one direction to formthe front end fold and then in the opposite direction to form the rear end fold on one end of the carton, and other means for forming 12. In a device of the character described', the combinationof continuously operating carton feeding and wrapper-folding mechanism, the latter includingan element mov-- abletoward andaway from the line of carton travel to form the folds ononeend of the carton, a similar element on the other side of the machine, connections between said elements, and other means for forming the other folds. 13. In a device of the character described, the combination of an endless carton-feeding'conveyor .and a .vrapper-foldin mechanism, the latter including. a pivote element movable to vform irst the front end fold and then the rear end fold carton, asimilar elementv on the other-,side ofthe machine, connections between said elements, and other means for forming the other folds..

14.` In a device ofthe character described, the combination carton-feeding and wrapper-folding mechanism, the latter including lan oscillating element movable toward and away fromA the line of -cartontravel'irst 4to formthe front .end fold and'then to form 'the rear end fold a similar element` connections on one eiid of the carton, onthe other side of the machine,

front and rearend.

on one end ofthe! between said elements, and other means for t forming the other folds. 15. In a device ofthe the combination of carton-feeding and Wrap per-foldin mechanism, means for successively fol ing the front and rear end flaps, means engaging the top and bottom end flaps after the front end flap has beenmade andv before the rearend ap has been folded, and other` means for 17. In a device character described,v the combination ofva continuously moving endless carton-feeding conveyor and a wrapform the rear end 11o i forming the other flaps. 1 of the character described,

the combination of carton-feeding and wrapper-folding .'mechanism, sively foldingthe front and rear. end flaps, means carried by said folding means and engzliging the t e front en p'has been made and before the rear end -ap has been folded, and other meansfor forming the other flaps.

18. In a device of the haracter described, the combination of al cartonafeeding and wrapper-folding mechanism, a single pivoted element successively -foldn'glthe front and rear end flaps 'at one end .of t ecarton, means engaging between the to and bottom end flaps after the front end ap has beenmade and before the rear'end flap Aand other means for forming 19. In a device of the other flaps.

means for succeshas been folded,

the character described,

toaand bottom end 'flaps afterV d the combination of carton-feeding and wrapper-folding mechanism, a single pivoted element successively folding the front and rear end flaps at one end'of the carton, means carried by said element and engaging between the top and bottom end flaps after the front end flap has been made and lbefore the rear end flap has been folded, and other means for forming the other flaps.

20. In a device of the character described, the combination of carton-feeding and wrapper-folding mechanism, a single pivote-d element successively folding the front and rear end flaps at one end of the carton, a similar element onthe other side of themachine and I connections between. said elements, spacing means carried by each element and engaging between the top and bottom end flaps after the front end flap has been made and before the rear end lap is folded, and other means for forming the other flaps.

21. In a device of the character described,

the combination of a continuously operating -`carton-feeding and wrapper-folding mechanism, vertically pivoted members operating to successively fold the front and rear end aps, means applyin adhesive to one of the r mailling end aps, andv means for folding said remaining end flaps.

22. In a device of the character described,

the combination of a continuously operating carton-feeding and wrapper-folding mechanism, vertically pivoted members operating to successively fold the front and rear end ,iiapa means applying adhesive to the under face of the top end flap, means for folding the bottom end flap, folding-said top endflap;

23. In a device of the character described, the combination ofl a continuously operating carton-feeding and wrapper-folding mechanism, vertically pivoted members operating to successively fold the front and rear end ilaps, means applying adhesive to one of the remaining'endflapsg" means folding the bottom end iiap, and means thereafter folding the top4 end flap and sealing the same against the b ottom of the carton.

24. in a device of the characterdescribed, the combination of a carton-feeding and wrapper-folding mechanism, vertically pivoted members operating to continuously .operating and-'means for thereafter successively fold the front and rear end aps,

means folding oneof the remainingA end flaps, means applying adhesive to -the end flap and sealing the same against the opposite face of the carton.

in testimony whereof l have Signed this specication. l

@SCAR SNDBERG. 

